桥梁桩基穿越多层岩溶地段的钻孔技术

Boring technology of pile foundation of bridge to penetrate multilayer of karsts

总结了水富—麻柳湾高速公路部分岩溶地区桥梁桩基钻孔的施工经验,阐述了在岩溶地质条件下穿越多层溶洞钻孔施工中的偏孔防治及穿越尺寸较大且填充物为流塑状物的溶洞的处治方法,从而使桩基础满足设计要求。

This paper sums up construction experience of bore for pile foundation of bridge in partial karsts region in Shuifu-Maliuwan express, states prevention of slanting bore in process of penetrating muhilayer of karsts under karsts geology, and explains handling method for passing through large karsts cave of full soft flowing clay and debris, so as to make piee fomdation to meet the design requirenents.